/Engine/Plugins/Runtime/AudioWidgets/Source/AudioWidgets/Public/SFixedSampledSequenceRuler.h
class SFixedSampledSequenceRuler : public [SCompoundWidget](API\Runtime\SlateCore\Widgets\SCompoundWidget)
FOnTimeUnitMenu...
OnTimeUnitMenuSelection
Delegate sent when the user selects a new display unit from the RMB menu